SupperTimmyH
Posts: 2
Joined: Mon Nov 09, 2020 3:32 am

Raspberry Pi 400 setup as laptop

Mon Nov 09, 2020 3:40 am

Hi all,
the idea of Raspberry Pi 400 is really neat. I want to buy one for my kid's school computer. Is there any good recommendation for a portable monitor? Preferably touch screen with pass-thru power supply.
Also, a newbie question. How is the experience of raspbian OS as a Chromebook alternative?

Appreciated.

P.S. Asked this question on the subreddit but got removed from the stream. :?:

W. H. Heydt
Posts: 15395
Joined: Fri Mar 09, 2012 7:36 pm
Location: Vallejo, CA (US)

Re: Raspberry Pi 400 setup as laptop

Mon Nov 09, 2020 6:34 am

SupperTimmyH wrote:
Mon Nov 09, 2020 3:40 am
Hi all,
the idea of Raspberry Pi 400 is really neat. I want to buy one for my kid's school computer. Is there any good recommendation for a portable monitor? Preferably touch screen with pass-thru power supply.
Also, a newbie question. How is the experience of raspbian OS as a Chromebook alternative?

Appreciated.

P.S. Asked this question on the subreddit but got removed from the stream. :?:
My grandson is set up using RPiOS (formerly Raspbian) on a Pi4B4. His school district uses Google meet. So that's an equivalent processor to the Pi400.

aBUGSworstnightmare
Posts: 3854
Joined: Tue Jun 30, 2015 1:35 pm

Re: Raspberry Pi 400 setup as laptop

Mon Nov 09, 2020 7:49 am

SupperTimmyH wrote:
Mon Nov 09, 2020 3:40 am
Hi all,
the idea of Raspberry Pi 400 is really neat. I want to buy one for my kid's school computer. Is there any good recommendation for a portable monitor? Preferably touch screen with pass-thru power supply.
Also, a newbie question. How is the experience of raspbian OS as a Chromebook alternative?

Appreciated.

P.S. Asked this question on the subreddit but got removed from the stream. :?:
There are tons of them on Amazon, so it depends on your budget and/or size requirements (resolution and/or size). Many of them look the same for me, with just a different brand logo on the front (https://www.amazon.de/s?k=usb-c+touch+m ... nb_sb_noss) . If they are good? depends on your requirements! I once bought a 13.3in FHD portable screen in an aluminium chassis which was nice from the display quality, but suffered from it's portable aspect (although they are claimed to be 'portable' the design is not very sturdy, even when using Al).

mrlinux2u
Posts: 253
Joined: Sat Sep 24, 2011 8:38 pm

Re: Raspberry Pi 400 setup as laptop

Mon Nov 09, 2020 8:53 am

SupperTimmyH wrote: Hi all,
the idea of Raspberry Pi 400 is really neat. I want to buy one for my kid's school computer. Is there any good recommendation for a portable monitor? Preferably touch screen with pass-thru power supply.
Also, a newbie question. How is the experience of raspbian OS as a Chromebook alternative?

Appreciated.

P.S. Asked this question on the subreddit but got removed from the stream. :?:
The PiHut stocks the following (https://thepihut.com/products/hannspree ... ch-monitor) 15.6" touch screen, it doesn't have pass through power but it may be portable enough for your use.

As for using RPiOS as a Chromebook alternative, I personally find it more than adequate (especially with the latest Chromium update) and with an SSD drive I find it faster than my Intel based Chromebook (my partner's using a Pi 4B 2GB running off an A1 SD card and that's more than fast enough for browsing and using Libreoffice)

My Pi 400 is now my daily desktop at home (Browsing, development work using Lazrus/Free Pascal,Steam client etc...).

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HermannSW
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Location: Eberbach, Germany
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Re: Raspberry Pi 400 setup as laptop

Mon Nov 09, 2020 11:22 pm

I use a cheap (26$ in total) 9" 1024x600 HDMI monitor with 13000mAh Anker power bank as Pi4B laptop.
I will replace Pi4B and wireless keyboard in a few days when my Pi400 will have arrived:
viewtopic.php?p=1709675#p1613145
Pi4B.laptop.jpg
Pi4B.laptop.jpg
Pi4B.laptop.jpg (32.16 KiB) Viewed 8027 times
https://github.com/Hermann-SW/memrun
https://stamm-wilbrandt.de/2wheel_balancing_robot
https://stamm-wilbrandt.de/en#raspcatbot
https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter
https://stamm-wilbrandt.de/en/Raspberry_camera.html

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HermannSW
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Location: Eberbach, Germany
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Re: Raspberry Pi 400 setup as laptop

Fri Nov 20, 2020 10:41 pm

Done, my Pi400 arrived today.
Anker 13000mAh powerbank that delivers 5V/3A could be placed behind the wooden board with 9" HDMI display as well.
This is my "Pi400 laptop", easy to move anywhere.
Mouse is connected to USB2, one USB3 powers 5V of HDMI display, power bank powers Pi400 USB-C, display HDMI cable is connected:
https://stamm-wilbrandt.de/en/forum/20201120_231711.jpg (16MP smartphone photo)
20201120_231711.15%.jpg
20201120_231711.15%.jpg
20201120_231711.15%.jpg (38.99 KiB) Viewed 7314 times



I have tested Anker powerbank with Pi4, wireless USB keyboard and same HDMI display before, no problems there, and therefore no problems to be expect with Pi400.


Bill of material (139.50$ in total):

Code: Select all

70$     Raspberry Pi400 unit
 9$     Raspberry Pi mouse
30$     Anker 13000mAh powerbank
26$     9" 1024x600 HDMI display  (https://www.raspberrypi.org/forums/viewtopic.php?p=1709675#p1613145)
 4.50$  adjustable display stand  (https://twitter.com/HermannSW/status/1327550784796504064)
https://github.com/Hermann-SW/memrun
https://stamm-wilbrandt.de/2wheel_balancing_robot
https://stamm-wilbrandt.de/en#raspcatbot
https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter
https://stamm-wilbrandt.de/en/Raspberry_camera.html

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HermannSW
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Location: Eberbach, Germany
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Re: Raspberry Pi 400 setup as laptop

Fri Nov 20, 2020 11:34 pm

Correction!
HermannSW wrote:
Fri Nov 20, 2020 10:41 pm
Mouse is connected to USB2, one USB3 powers 5V of HDMI display, power bank powers Pi400 USB-C, display HDMI cable is connected:
Anker 13000mAh powerbank can power two devices, so connect HDMI monitor USB cable to powerbank directly instead.
That leaves two USB3 ports of Pi400 free:
20201121_002924.15%.jpg
20201121_002924.15%.jpg
20201121_002924.15%.jpg (45.9 KiB) Viewed 7284 times

P.S:
Now it is time to move powerbank behind wooden board.
Then only USB-C and HDMI cable pass below wooden board, and mouse cable from right, to the Pi400.
https://github.com/Hermann-SW/memrun
https://stamm-wilbrandt.de/2wheel_balancing_robot
https://stamm-wilbrandt.de/en#raspcatbot
https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter
https://stamm-wilbrandt.de/en/Raspberry_camera.html

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kerry_s
Posts: 2654
Joined: Thu Jan 30, 2020 7:14 pm

Re: Raspberry Pi 400 setup as laptop

Sat Nov 21, 2020 12:48 am

if i was going laptop style.
https://www.amazon.com/Maker-1280x800-S ... 253&sr=8-6

i was thinking about this keyboard case instead, so later when i get an 8gb it'll be easy to upgrade. :D
https://www.amazon.com/Vilros-Keyboard- ... 253&sr=8-3

just spotted another alternative, but no protection for the pi.
https://www.amazon.com/Touch-Screen-Key ... 4XDCZV8GQJ

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HermannSW
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Location: Eberbach, Germany
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Re: Raspberry Pi 400 setup as laptop

Sat Nov 21, 2020 3:38 pm

Completely reworked how display, display controller as well as manual control are connected to wooden board (pairs of flat Lego pieces, superglued to wooden board, display, display controller and manual control. This allows eg. to easily switch 10" display to 9" display. Find details in this posting:
viewtopic.php?f=45&t=254059&p=1765050#p1765050


On the back any unused cable is stuffed into powerbank bag hanging at manual control bottom Lego connector:
20201121_152324.15%.jpg
20201121_152324.15%.jpg
20201121_152324.15%.jpg (48.17 KiB) Viewed 7091 times



Now the front of "easy to move anywhere" Pi400 laptop looks absolutely clean cable wise:
20201121_152136.15%.jpg
20201121_152136.15%.jpg
20201121_152136.15%.jpg (47.6 KiB) Viewed 7091 times
https://github.com/Hermann-SW/memrun
https://stamm-wilbrandt.de/2wheel_balancing_robot
https://stamm-wilbrandt.de/en#raspcatbot
https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter
https://stamm-wilbrandt.de/en/Raspberry_camera.html

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davidcoton
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Location: Cambridge, UK

Re: Raspberry Pi 400 setup as laptop

Sat Nov 21, 2020 4:05 pm

HermannSW wrote:
Sat Nov 21, 2020 3:38 pm
On the back any unused cable is stuffed into powerbank bag hanging at manual control bottom Lego connector:
I n general it is not a good idea to keep active cables in a bag, especially a flammable cloth bag. Although the load from a Pi is very small, coiled cables can get hot when loaded. I know, I once cooked a drum of mains flex by not unwinding it all before use.
Location: 345th cell on the right of the 210th row of L2 cache

cleverca22
Posts: 4897
Joined: Sat Aug 18, 2012 2:33 pm

Re: Raspberry Pi 400 setup as laptop

Sat Nov 21, 2020 6:42 pm

davidcoton wrote:
Sat Nov 21, 2020 4:05 pm
HermannSW wrote:
Sat Nov 21, 2020 3:38 pm
On the back any unused cable is stuffed into powerbank bag hanging at manual control bottom Lego connector:
I n general it is not a good idea to keep active cables in a bag, especially a flammable cloth bag. Although the load from a Pi is very small, coiled cables can get hot when loaded. I know, I once cooked a drum of mains flex by not unwinding it all before use.
easy enough to just grab an ohm meter, and measure the total resistance of the gnd and vcc wires in the usb cable
ohms law can then tell you how many watts worth of head it is generating

the tricky part then, is knowing how much the temp will rise from that, and how insulating the bag is

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HermannSW
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Location: Eberbach, Germany
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Re: Raspberry Pi 400 setup as laptop

Sun Nov 22, 2020 10:55 am

davidcoton wrote:
Sat Nov 21, 2020 4:05 pm
HermannSW wrote:
Sat Nov 21, 2020 3:38 pm
On the back any unused cable is stuffed into powerbank bag hanging at manual control bottom Lego connector:
I n general it is not a good idea to keep active cables in a bag, especially a flammable cloth bag. Although the load from a Pi is very small, coiled cables can get hot when loaded. I know, I once cooked a drum of mains flex by not unwinding it all before use.
I did touch the bag after quite some use, and there isn't anything warm.

Anyway, I addressed your concerns, this is new Pi400 laptop backside view:
(each of the three cables excess length binded together separatel)
20201122_112857.15%.jpg
20201122_112857.15%.jpg
20201122_112857.15%.jpg (44.15 KiB) Viewed 6926 times

P.S:
I have to install stuff missing on Pi400 after initial install. For writing this posting I had to install netpbm tools for resizing 16MP smartphone photo to 15%. And I added new Pi400 entry to my smartphone's AndFTP app that I use to transfer photos and videos to different computers via scp.
https://github.com/Hermann-SW/memrun
https://stamm-wilbrandt.de/2wheel_balancing_robot
https://stamm-wilbrandt.de/en#raspcatbot
https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter
https://stamm-wilbrandt.de/en/Raspberry_camera.html

Leeloo
Posts: 68
Joined: Fri Oct 06, 2017 9:53 pm

Re: Raspberry Pi 400 setup as laptop

Sun Nov 22, 2020 5:32 pm

HermannSW wrote:
Mon Nov 09, 2020 11:22 pm
I use a cheap (26$ in total) 9" 1024x600 HDMI monitor with 13000mAh Anker power bank as Pi4B laptop.
I wanted to try the powerbank idea the only issue being one of the power bank I was testing had no indicator as to how much power is remaining, is there any solution for this ?

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HermannSW
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Re: Raspberry Pi 400 setup as laptop

Sun Nov 22, 2020 7:30 pm

Leeloo wrote:
Sun Nov 22, 2020 5:32 pm
I wanted to try the powerbank idea the only issue being one of the power bank I was testing had no indicator as to how much power is remaining, is there any solution for this ?
As you can see in photo above the "Anker 13000mAh" powerbank has indicators (4 blue).

You can add indicator for 1S/2S/3S/4S/8S rating lipos -- they should work with powerbank as well:
https://twitter.com/HermannSW/status/13 ... 7449483264
Image
https://github.com/Hermann-SW/memrun
https://stamm-wilbrandt.de/2wheel_balancing_robot
https://stamm-wilbrandt.de/en#raspcatbot
https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter
https://stamm-wilbrandt.de/en/Raspberry_camera.html

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davidcoton
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Location: Cambridge, UK

Re: Raspberry Pi 400 setup as laptop

Sun Nov 22, 2020 10:59 pm

HermannSW wrote:
Sun Nov 22, 2020 7:30 pm
Leeloo wrote:
Sun Nov 22, 2020 5:32 pm
I wanted to try the powerbank idea the only issue being one of the power bank I was testing had no indicator as to how much power is remaining, is there any solution for this ?
As you can see in photo above the "Anker 13000mAh" powerbank has indicators (4 blue).

You can add indicator for 1S/2S/3S/4S/8S rating lipos -- they should work with powerbank as well:
https://twitter.com/HermannSW/status/13 ... 7449483264
Image
Only works if you can access the actual cell terminals. Capacity cannot easily be determined from the powerbank output.
(The hard way involves integrating current over time, and knowing when the cell is fully charged.)
Location: 345th cell on the right of the 210th row of L2 cache

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HermannSW
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Re: Raspberry Pi 400 setup as laptop

Sun Nov 22, 2020 11:09 pm

davidcoton wrote:
Sun Nov 22, 2020 10:59 pm
Only works if you can access the actual cell terminals.
I once opened a single 18650 type powerbank, and was able to close it again.
My 13000mAh Anker power bank has indicators, so no need to open.
OP has powerbank without indicators, so can decide whether to open (carefully) and go with 1$ indicators I pointed to, or buy another powerbank with indicators, his choice.


P.S:
It seems someone always have opened everything, I just searched on youtube for "anker 13000 open" and found this:
https://www.youtube.com/watch?v=SCtVx3g2XO4
anker.130000.open.jpg
anker.130000.open.jpg
anker.130000.open.jpg (63.88 KiB) Viewed 6763 times
So go to youtube and search for your powerbank, and most likely somebody will have opened it.
It seems not that difficult to access the terminals for adding indicator, eg. when builtin leds will not work anymore.
Last edited by HermannSW on Sun Nov 22, 2020 11:41 pm, edited 1 time in total.
https://github.com/Hermann-SW/memrun
https://stamm-wilbrandt.de/2wheel_balancing_robot
https://stamm-wilbrandt.de/en#raspcatbot
https://github.com/Hermann-SW/Raspberry_v1_camera_global_external_shutter
https://stamm-wilbrandt.de/en/Raspberry_camera.html

cleverca22
Posts: 4897
Joined: Sat Aug 18, 2012 2:33 pm

Re: Raspberry Pi 400 setup as laptop

Sun Nov 22, 2020 11:39 pm

i used https://www.sparkfun.com/products/10617 on a lipo many years back

only issue i can remember, is that the i2c bus has a pullup to the battery voltage, so i had to cut a trace on the pcb

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